Product Specification

• YM129900-42055 YM12990042055 129900-42055 Water Pump KOMATSU Engine 4D92E 4D94E 4D98E

• Specification

• Compatible models

ENGINES 4D92E 4D94E 4D98E KOMATSU

A water pump is a vital component in an engine's cooling system. Its main function is to circulate coolant (usually a mixture of water and antifreeze) throughout the engine to regulate its temperature and prevent overheating. Here's an overview of how a typical water pump works:

Location and Housing: The water pump is usually located near the front of the engine and is driven by a pulley connected to the engine's crankshaft via a belt or a chain. It is often mounted on the engine block and connected to the radiator by hoses.

Impeller: Inside the water pump housing, there is an impeller. The impeller is a rotating component with curved blades. When the engine is running, the impeller is driven by the engine's mechanical energy.

Coolant Circulation: As the impeller rotates, it creates a centrifugal force that draws coolant from the engine and pushes it through the cooling system. The coolant is pulled in from the engine's lower portions and pushed through the engine block and cylinder head passages, absorbing heat generated by the engine.

Coolant Flow to Radiator: After absorbing heat from the engine, the coolant flows through the upper hose to the radiator. In the radiator, the coolant releases its heat to the surrounding air through the radiator's fins. This process helps to lower the coolant's temperature.

Return to Engine: Once the coolant has been cooled in the radiator, it is pumped back into the engine by the water pump. The cycle continues as long as the engine is running, maintaining a consistent operating temperature.

Both Komatsu and Yanmar, as manufacturers of engines, would incorporate water pumps designed to meet the specific cooling needs of their engines. The design, specifications, and features of these water pumps can vary depending on factors such as the engine model, size, and application.

• We could supply the following spare parts

1 Hydraulic parts: hydraulic pump, main valve, hydraulic cylinder, final drive, travel motor, swing machinery, swing motor etc.

2 Engine parts: engine ass’y, piston, piston ring, cylinder block, cylinder head, crankshaft, turbocharger, fuel injection pump, starting motor and alternator etc.

3 Undercarriage part: Track roller, Carrier roller, Track Link, Track shoe, Sprocket, Idler and Idler cushion etc.

4 Cab parts: operator’s cab, wiring harness, monitor, controller, seat, door etc.

5 Cooling parts: Radiator, air conditioner, compressor, after cooler etc.

6 Other parts: Service kit, swing circle, engine hood, swing joint, fuel tank, filter, boom, arm, bucket etc.

• Advantage

1. Offer Top quality & competitive products

2. Support 12-month warranty

3. 100% tested before shipping

4. Delivery in time

5. A wide range of Oil Pressure Sensor, Fuel Tank Level Sensor, Temperature Sensor, Speed Sensor for excavator 

6. More than 15 years production and 11 years foreign trade experience

7. Professional QC team

8. Best sales team, 24 hours service

• Packing and Shipping

Packing Details :

inner packing : plastic film for wrapping

external packing : wooden case

Shipping :

within 3 days after received the payment , by air or by express or by sea on the basis of the

quantity and emergency circumstances.

1. By Couriers: DHL, UPS, FEDEX, TNT are the main courier companies we are cooperated,

2. By Air: Delivery from the Guangzhou air port to customer's destination city air port.

3. By Sea: Delivery from the Huangpu port .

• Product Warranty

1. Warranty Period: 3 Months' warranty from the date of arrival. Longer period of 6 months' warranty could be offered with higher price level.

2. Warranty type: replacement of the parts that have quality problem.

3. Warranty is not valid for below cases

* Cutomer give wrong information about the order

* Force Majeure

* Wrong installation and operation

* Rust because of wrong stock & maintenance